// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/layers/picture_image_layer.h"

#include "cc/animation/animation_host.h"
#include "cc/playback/display_item.h"
#include "cc/test/fake_layer_tree_host.h"
#include "cc/test/skia_common.h"
#include "cc/test/test_task_graph_runner.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkColor.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkSurface.h"

namespace cc {
namespace {

    TEST(PictureImageLayerTest, PaintContentsToDisplayList)
    {
        scoped_refptr<PictureImageLayer> layer = PictureImageLayer::Create();
        FakeLayerTreeHostClient client;
        TestTaskGraphRunner task_graph_runner;
        auto animation_host = AnimationHost::CreateForTesting(ThreadInstance::MAIN);
        std::unique_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create(
            &client, &task_graph_runner, animation_host.get());
        layer->SetLayerTreeHost(host.get());
        gfx::Rect layer_rect(200, 200);

        unsigned char image_pixels[4 * 200 * 200] = { 0 };
        SkImageInfo info = SkImageInfo::MakeN32Premul(layer_rect.width(), layer_rect.height());
        sk_sp<SkSurface> image_surface = SkSurface::MakeRasterDirect(info, image_pixels, info.minRowBytes());
        SkCanvas* image_canvas = image_surface->getCanvas();
        image_canvas->clear(SK_ColorRED);
        SkPaint blue_paint;
        blue_paint.setColor(SK_ColorBLUE);
        image_canvas->drawRectCoords(0.f, 0.f, 100.f, 100.f, blue_paint);
        image_canvas->drawRectCoords(100.f, 100.f, 200.f, 200.f, blue_paint);

        layer->SetImage(image_surface->makeImageSnapshot());
        layer->SetBounds(gfx::Size(layer_rect.width(), layer_rect.height()));

        scoped_refptr<DisplayItemList> display_list = layer->PaintContentsToDisplayList(
            ContentLayerClient::PAINTING_BEHAVIOR_NORMAL);
        unsigned char actual_pixels[4 * 200 * 200] = { 0 };
        DrawDisplayList(actual_pixels, layer_rect, display_list);

        EXPECT_EQ(0, memcmp(actual_pixels, image_pixels, 4 * 200 * 200));

        layer->SetLayerTreeHost(nullptr);
    }

} // namespace
} // namespace cc
